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Dvun Audio

GUSTARD A20H / XMOS PCM/DSD USB DAC Double AK4497 Headphone Amplifier

GUSTARD A20H / XMOS PCM/DSD USB DAC Double AK4497 Headphone Amplifier

$752.00
$752.00 $752.00
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Geshide /GUSTARD - A20H  XMOS USB PCM/DSD DOP DAC Decoding Machine Double AK4497 Headphone Amplifier

20161110_100518_017

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Highlight

1.  Dual AK4497 class A full balance ampnative full balance.
2.  Decoder and amplifier all-in-one well proportioneddouble power supply design.
3. Clock management 2nd PLL digital plasticDOP demodulation/modemPCM/DSD depop switch and other exclusive technology.
4. All interfaces support DSD decodingdigital broadcastingUSB supports 384K DSD256.
Technical features
1. The latest hi-end AKM AK4497EQ decoding chips make no interference in L/R channels and purer sound
2.  Clock management 2 nd PLL digital plasticDOP demodulation/modemPCM/DSD depop switch and other exclusive technology.
3.  Using full discrete component large current hi-end full-balanced amplifiereach channel uses two separated amplifier unit to form asymmetric output circuits.
4.  Native full balance architecture there is no any transition from DA to amp circuitsit is a complete four-way output volume.
5.  Using two customized 50w audio specialized ring transformers to supply power separately to the amp and decoderso that their power supply has no interference to each other.
6.  Using own-created individual analog LPF cirtuitsthe parameters of each level has been carefully adjusted to achieve the best conditions.
7.  The all interfaces support DSD decoding :IIS supports DSD64DSD128DSD256DSD512 decoding; SPDIFOpticalAES/EBU support DSD64 decoding(DOP mode); USB supports SD64DSD128DSD256 decoding.
8.  Rich digital filteringtwo kinds of DSD: Wide BW/Narrow BW;six kinds of PCM: Short Delay Shar p / Short Delay Slow / Shar p / Slow / Low-dispersion Short Delay Filter/ Super Slow.
9.  Adjustable screen brightness:it will return to the default brightness after 30s'no-operation;it will automatically remember the current brightnessand the next time you start up it will keep the last setting.
10.  The USB uses the USBAUDIO specialized U8 chip from XMOSit can support PCM384 DSD256.
11.  Full aluminum alloy boxtwo colors(silver and black) are available.
Parameters:
Size:330*260*65 mm(w*d*h)
Size with package:420*360*175 mm(w*d*h)
Weight with package:6.5kg
Voltage:AC100v-240v
Frequency response:20Hz-20kHz+/-0.1dB
Output circuit(turning off the pre-amp):R output level: 2.0Vrms@0dBFS XLR output level : 4.0 Vrms @0dBFS
XLR interface:American standard (1 ground wire2 positive line3 negative line)
Earphone max output power: 2400mW@32Ω
Load power:
32Ω         2400mW
64Ω         1230mW
150Ω         530mW
300Ω         264mW
600Ω         132mW
Rigorous designrational layoutclean workmanshipexcellent materials

 

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Analog LPF circuit using Fully discrete circuit  Class-A line.

Fully discrete circuit  Class-A work flexibility. It is free to adjust the parameters of each level.

Technical experience and long debugging process to achieve the best working condition.

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AK4118 receive demodulation - sent to the CPLD for processing;

CPLD programmable logic chip self-built logic functions of digital integrated circuits clock management 2nd PLL digital shaping DOP demodulation PCM / DSD depop switch and other exclusive technology;

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Fully discrete circuit High Current Pure Class-A Balanced Headphone Amplifier.

Professional team design.

The input stage adopts audio special low-noise tube full-DC amplification carefully debug each level work in the best working condition.

The final stage use 4xMedium power tube Big Output Power most of the headset to play the best results;

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2X50W custom toroidal transformer.Completely independent power supply do not interfere with each other.For high-quality sound to provide better power supply environment and power;

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filtering and voltage regulation. To ensure clean and stable power supply;

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Relay array 60 files simulation of lossless volume adjustment;

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XOMS U8 USB Professional SOUND RD:

XMOS USB using the latest and highest-level U8 (8 core) USB AUDIO scheme

PCM highest support 32Bit 384K

DSD Support DSD64 (2.8224MHz) DSD128 (5.6448MHz) with leading system compatibility:

Compatible includes 32/64-bit Microsoft Windows XP WindowsVista Windows7 Windows8 Windows 8.1 Windows 10 and other mainstream Windows systems supports Apple MacOSsystems Linux kernel support system and is compatible with partial support OTGfunction of iOS Android smart devices .

American  ACCUSILICON femtosecond crystal;

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Full interface supports DSD.

IIS supports DSD64 DSD128 DSD256 DSD512;

USB support DSD64 DSD128 DSD256;

Coaxial / fiber / AES / EBU support DSD64 (DOP mode);

 

Frequency response

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THD+N

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SNR

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Headphone amplifier 2-channel each connected 32Ω loadOutput power at 2400mW: distortion and waveform.

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I2S Pin definition

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